Wood golf club head

ABSTRACT

The present invention is to provide a wood golf club head comprising a rear casing and a front casing both made of metal. The rear casing has a cup-like main body with an opening at a front side thereof. The front has a main plank and an annular side wall backwardly integrally extending from the peripheral of said main plank. The rear casing and the front casing are fixed together by means of the distal end of the side wall of the front casing fixing with the edge of the opening of said rear casing such that a hollow main body is defined by the main plank and the side wall of the front casing and the main body of the rear casing, and a hitting face is defined by the exterior surface of the main plank.

FIELD OF THE INVENTION

[0001] The present invention relates to a golf club, and more particularly to an oversize wood golf club head.

BACKGROUND OF THE INVENTION

[0002] A conventional golf club, especially for a driver, normally has a club head of 250 cc in volume. But there is an oversize head with volume of 300 cc or bigger. The advantages of the oversize head are that it has larger area of sweet spot on the face and higher tolerance when hitting. But various club heads have their own limitation in weight so that an oversize head is not enlarged its volume from a normal club had. In consideration of the club head, a heavier head would affect the swing accuracy. Therefore, the oversize club head must be constructed from a specific material or a specific structure to get a bigger size.

SUMMARY OF THE INVENTION

[0003] The primary objective of the present invention is to provide a wood golf club head, which has a gravity located at rear size and its face has well capacity of spring-like effect to drive ball further, furthermore, the golf club head of the present invention is easy to be manufactured as an oversize head.

[0004] According to the objective of the present invention, a wood golf club head comprises a rear casing and a front casing both made of metal. The rear casing has a cup-like main body with an opening at a front side thereof. The front has a main plank and an annular side wall backwardly integrally extending from the peripheral of said main plank. The rear casing and the front casing are fixed together by means of the distal end of the side wall of the front casing fixing with the edge of the opening of said rear casing such that a hollow main body is defined by the main plank and the side wall of the front casing and the main body of the rear casing, and a hitting face is defined by the exterior surface of the main plank. The golf club head further comprises a neck which can be integrally or independently connected to the front casing or the rear casing.

BRIEF DESCRIPTION OF THE DRAWINGS

[0005]FIG. 1 is a top view of a first preferred embodiment of the present invention;

[0006]FIG. 2 is a sectional view taken along line 2-2 of FIG. 1;

[0007]FIG. 2A, FIG. 2B and FIG. 2C are enlarged views in part of FIG. 2, showing alternative structures of the connecting portions;

[0008]FIG. 3 is a top view of a second preferred embodiment of the present invention, and

[0009]FIG. 4 is a top view of a third preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0010] Please refer to FIG. 1 and FIG. 2, the first preferred embodiment of the present invention provides a wood golf club head 10, which is mainly constructed from a rear casing 20 and a front casing 30.

[0011] The rear casing 20 is made from casting metal, such as stainless, aluminum or magnesium etc. The rear casing 20 has a cup-like main body 21 having an opening 22 at front side thereof. The thickness of the main body 21 is about 0.6 mm to 0.7 mm. The main body 21 is thicker at the edge of the opening 22 at which has an annular slot 23. The main body 21 is provided with a neck 24 at the side opposite the heel of the club head 10 to mount a shaft (not shown) therein.

[0012] The front casing 30 is made from forging or pressing lighter metal, such as titanium or titanium alloy. The front casing 30 has a main plank 31 on which a plurality of dents 32 are provided, and an annular side wall 33 extending backwardly integrally from the periphery of the main plank 31. The thickness of the front casing 30 is about 0.6 mm to 0.7 mm. The extended length of the side wall 33 is about 3 mm to 40 mm and it has an annular flange 34 at inner side of the distal end thereof.

[0013] The front casing 30 is fixed with the rear casing 20 by means of the main plank 31 covering the opening 22. In the present preferred embodiment, please refer to FIG. 2, the flange 34 on the side wall 33 of the front casing 30 is engaged with the annular slot 23 of the rear casing 20 and brazed together. The connecting portions 33 a, 33 b, and 33 c of the rear casing 20 and the front casing 30 also can be replaced by the structures as shown in FIG. 2A, FIG. 2B and FIG. 2C, but the inventor found the preferred structure of the connecting portion is the structure shown in FIG. 2. The way of fixing the rear casing 20 and the front casing 30 together also can be done by putting epoxy resin between the connecting surfaces of the rear casing 20 and the front casing 30 to bond them together or by welding the edges of the connecting portions of the two casings 20 and 30 and then grinding the welded portion. At this time, the rear casing 20 and the front casing are combined to form the golf club head 10 of the present invention. The golf club head 10 has a main body 11 and the main plank 31 of the front casing 30 forms a face 12 of the golf club head 10 with the dents 32 thereon. A smoothing process will work onto the connecting portions of the rear casing 20 and the front casing 30 to make the golf club head 10 of the present invention has a smooth surface.

[0014] With the structure, the hollow main body 11 of the golf club head 10 of the present invention has a thinner side wall so that the golf club head 10 can be made into an oversize golf club head with a larger sweet spot and higher tolerance of hitting. The front casing 30 is made of lighter material, such as titanium, to make the gravity of the golf club head 10 of the present invention located at rear side thereof, and more particularly, the face 12 (the main plank 31) is very thin such that it has a well spring-like effect (also called trampoline effect) to drive a ball further. So that, the golf club head 10 of the present invention is a best choice to be a driver.

[0015]FIG. 3 shows a golf club head 40 of the second preferred embodiment of the present invention, similar to the first preferred embodiment, it is constructed from a rear casing 50 and a front casing 60. The rear casing 50 has a cup-liked main body 51 and an opening 52 at front side of the main body 51. The front casing 60 has a main plank 61 and an annular side wall 63. The structure of the connecting portions of the rear casing 50 and the front casing 60 also can be chosen from the structures shown in FIG. 2, FIG. 2A, FIG. 2B and FIG. 2C. The golf club head 40 of the second preferred embodiment also has a main body 41. The different part of the of the golf club head 40 of the second preferred embodiment from the golf club head 10 of the first preferred embodiment is that a neck 65 is integrally formed on the front casing 60 at initial rather than the rear casing 50. In detail, the front casing 60 is made from forging a metal plank to form the main plank 61 and the side wall 62 at first, and then partially forging again to form the neck 65. The golf club head 40 of the second preferred embodiment also has the advantages as described above.

[0016]FIG. 4 shows a golf club head 70 of the third preferred embodiment of the present invention, it is also constructed from a rear casing 74 and a front casing 76. A neck 72, which is an independent element, is mounted on the golf club head 70 by welding, brazing or glue. The position of the neck 72 can be on the rear casing 74, the front casing 76 or the connecting portion of the rear casing 74 and the front casing 76. 

What is claimed is:
 1. A wood golf club head, comprising: a hollow main body having a face at a front side thereof; a neck connected to said main body and upwardly extended; wherein the golf club head is constructed from a rear casing and a front casing, wherein said rear casing is made from metal having a cup-like main body with an opening at a front side thereof and said front casing is also made from metal having a main plank and an annular side wall backwardly integrally extended from the peripheral of said main plank, said rear casing and said front casing are fixed together by means of the distal end of said side wall of said front casing fixing with the edge of said opening of said rear casing such that said main plank and said side wall of said front casing and said main body of said rear casing form said hollow main body and the exterior surface of said main plank forms said face.
 2. The wood golf club head as defined in claim 1, wherein said neck is integrally connected to said rear casing.
 3. The wood golf club head as defined in claim 1, wherein said neck is integrally connected to said front casing.
 4. The wood golf club head as defined in claim 1, wherein said neck is an independent element connecting to said hollow main body.
 5. The wood golf club head as defined in claim 1, wherein said rear casing is provided with an annular slot at the edge of said opening and said front casing is provided with an annular flange at the distal end of said side wall to be engaged with said slot and the surface of the connecting portion of said rear casing and said front casing is smooth.
 6. The wood golf club head as defined in claim 1, wherein said side wall is extended from the periphery of said main plank in a length of 3 mm to 40 mm.
 7. The wood golf club head as defined in claim 1, wherein the thickness of said main body of said rear casing is 0.6 mm to 0.7 mm.
 8. The wood golf club head as defined in claim 1, wherein said rear casing is made of stainless, aluminum or magnesium.
 9. The wood golf club head as defined in claim 1, wherein said front casing is made of titanium or titanium alloy.
 10. The wood golf club head as defined in claim 1, wherein said front casing is fixed with said rear casing by means of brazing.
 11. The wood golf club head as defined in claim 1, wherein said front casing is fixed with said rear casing by means of epoxy resin. 